Absolute Measurement L-ANI-0-0-R-AC User manual

Amplifier Instruction
Manual
Range: LETIX
Type: L-ANI-0-0-R-AC
Supply: 110-240V AC
Output: 4-20mA
Revision: V1.0

_____________________________________________________________________________________________________________________
Absolute Measurement Ltd. (T/A CMC Controls)
t: (0) 1732 763278 | e: [e-mail] | w: absolutemeasurement.co.uk
Unit 19 | Silver Birches Business Park | Aston Road | Bromsgrove | B60 3EU
1
Transducer Instruction Manual
Range: LETIX
Type: L-ANI-0-0-R-AC
Revision: V1.0
Contents
Contents........................................................................................................................................................1
1. General Description ..............................................................................................................................2
2. Installation ............................................................................................................................................3
2.1 Mechanical....................................................................................................................................3
2.2 Unit Electrical Connection Diagram..............................................................................................3
2.3 Transducer Electrical Connection Diagrams .................................................................................4
2.4 Supply Connection Diagram..........................................................................................................6
3. Supply Voltage ......................................................................................................................................7
4. Calibration.............................................................................................................................................7
4.1 Indicator........................................................................................................................................7
4.2 Direct Calibration –Full Scale Setting...........................................................................................8
4.3 Decimal Point................................................................................................................................8
4.4 Display value .................................................................................................................................8
4.5 Direct Calibration –Zero Scale Setting .........................................................................................8
4.6 Output Signal Calibration..............................................................................................................8
5. Troubleshooting....................................................................................................................................9
5.1 Digital Display Not Illuminated When Indicator Is Switched On...................................................9
5.2 Verify The Transducer Connections..............................................................................................9
5.3 Check The Display Is Reading Correctly When The Transducers Are Loaded...............................9

_____________________________________________________________________________________________________________________
Absolute Measurement Ltd. (T/A CMC Controls)
t: (0) 1732 763278 | e: [e-mail] | w: absolutemeasurement.co.uk
Unit 19 | Silver Birches Business Park | Aston Road | Bromsgrove | B60 3EU
2
Transducer Instruction Manual
Range: LETIX
Type: L-ANI-0-0-R-AC
Revision: V1.0
1. General Description
The LETIX Digital Web Tension Indicator continuously displays the true web tension either as a
percentage of total tension or in real engineering units.
The measurement of actual web tension is made by sensing, with strain gauge transducers (sometimes
referred to as 'load cells'), the force on a sensing roller caused by the tension in the web. The electrical
signal from the transducers is a combination of tension force and sensing roller deadweight.
The effect of the weight of the sensing roller is removed electrically, leaving the tension force signal only
to be displayed on the meter.
The LETIX indicator uses high specification A/D and D/A converters, power supply, and a bright LED
digital display, all housed in a standard DIN size case. The LETIX features as standard a transducer bridge
supply excitation of 5v (or 10v) DC, an independently scalable digital display and an isolated analogue
output (0 to +10V at 2mA maximum). It can be used as a remote display and/or as the input to a control
system.
The Indicator can accept full scale input voltages of either up to +/- 40 mV (foil strain gauges) or up to +/-
400 mV (semi-conductor strain gauges) for full display with selectable decimal point position and scaling,
and a zero offset for both positive and negative sensing.

_____________________________________________________________________________________________________________________
Absolute Measurement Ltd. (T/A CMC Controls)
t: (0) 1732 763278 | e: [e-mail] | w: absolutemeasurement.co.uk
Unit 19 | Silver Birches Business Park | Aston Road | Bromsgrove | B60 3EU
3
Transducer Instruction Manual
Range: LETIX
Type: L-ANI-0-0-R-AC
Revision: V1.0
2. Installation
2.1 Mechanical
The installation of this unit MUST be carried out by a competent person who has the relevant knowledge
and ability to install the unit in a safe manner, The installation is not the responsibility of CMC Controls or
Absolute Measurement Ltd.
The Indicator must be installed in a dry, non-hazardous location. A panel cut out of 92 mm (+1.0/0.0 mm)
x 45 mm (+1.0/0.0 mm) is required. The depth of the Indicator is 125 mm but extra provision must be
allowed for cable connections. A single fixing clip, behind the unit, retains the Indicator. To install, simply
insert the Indicator into the cut out and fit the clip to hold the Indicator in place.
The tension transducers must be installed in accordance with the installation procedure from the
transducer handbook. See the transducer part of the handbook or a specific drawing for the connection
details and wire colours.
2.2 Unit Electrical Connection Diagram
12345 6 78910 11 12 13
19
14 15 16 17 18
ANALOG
O/P OPTION
-+
SERIAL DATA
O/P OPTION
SIGNAL I/P & EXCITATION LOGIC INPUTS POWER
SEN- SIG-EXC- SIG+ SEN+ EXC+
ALARM LOCK
CALIB'n LOCK
NL
-+
LETIX Connection Diagram
Not
Used

_____________________________________________________________________________________________________________________
Absolute Measurement Ltd. (T/A CMC Controls)
t: (0) 1732 763278 | e: [e-mail] | w: absolutemeasurement.co.uk
Unit 19 | Silver Birches Business Park | Aston Road | Bromsgrove | B60 3EU
4
Transducer Instruction Manual
Range: LETIX
Type: L-ANI-0-0-R-AC
Revision: V1.0
2.3 Transducer Electrical Connection Diagrams
Connections for a Cleveland Kidder Classic Semi-Conductor Transducer (one Half Bridge Transducer)
Connections for two Cleveland Kidder Classic Semi-Conductor Transducer (two Half Bridge Transducer)
123456
Blue
Green
Red
Red
Green
Blue
B C
AC B
A
WIRINGDIAGRAM
For 2 CLASSICTransducers
EXC- SIG- SIG+ EXC+
TX TX
Green
Green
Red
Red
Blue
Blue
PLEASE NOTE
Connect the cable screens (green/yellow) to clean earth close to the LETIX Tension Indicator.
123456
Blue
Green
Red
B C
A
WIRING DIAGRAM
For 1 CLASSIC Transducer
EXC- SIG- SIG+ EXC+
TX
A4431
Blue
Green
Red

_____________________________________________________________________________________________________________________
Absolute Measurement Ltd. (T/A CMC Controls)
t: (0) 1732 763278 | e: [e-mail] | w: absolutemeasurement.co.uk
Unit 19 | Silver Birches Business Park | Aston Road | Bromsgrove | B60 3EU
5
Transducer Instruction Manual
Range: LETIX
Type: L-ANI-0-0-R-AC
Revision: V1.0
Connections for one Cleveland Ultra Semi-Conductor Transducer or one Full-Bridge Foil Gauge
Transducer.
12345 6
Red
Green
Blue
WIRINGDIAGRAM
For 1 ULTRATransducer
Yellow
EXC- SIG- SIG+ EXC+
TRANSDUCER
3
24
1
Connections for two Cleveland Kidder Ultra Semi-Conductor Transducers or two Full Bridge Foil Gauge
Transducers.
3
1234 5 6
Blue
Green
Red
WIRINGDIAGRAM
For 2 ULTRATransducer
Yellow
EXC- SIG- SIG+ EXC+
Red
Blue
Green
Yellow
TX
3241TX
241

_____________________________________________________________________________________________________________________
Absolute Measurement Ltd. (T/A CMC Controls)
t: (0) 1732 763278 | e: [e-mail] | w: absolutemeasurement.co.uk
Unit 19 | Silver Birches Business Park | Aston Road | Bromsgrove | B60 3EU
6
Transducer Instruction Manual
Range: LETIX
Type: L-ANI-0-0-R-AC
Revision: V1.0
2.4 Supply Connection Diagram
11 12 13
Do Not Connect
N
MainsA/C
L
MainsA/C
WIRINGDIAGRAM
For Mains Power Supply

_____________________________________________________________________________________________________________________
Absolute Measurement Ltd. (T/A CMC Controls)
t: (0) 1732 763278 | e: [e-mail] | w: absolutemeasurement.co.uk
Unit 19 | Silver Birches Business Park | Aston Road | Bromsgrove | B60 3EU
7
Transducer Instruction Manual
Range: LETIX
Type: L-ANI-0-0-R-AC
Revision: V1.0
3. Supply Voltage
The LETIX is available in two power supply options, which are specified and fitted by CMC Controls
before despatch according to the clients’ needs.
This unit is fitted with an AC mains supply 110-230V universal. This has a RED main connector.
The supply MUST be via a 400 mA Anti surge fuse, or similar, with a local MCB or isolator.
NOTE This unit is not fitted with a safety earth terminal. The protective Earth supply of the AC Mains and
the screens of the transducers, and any other cable, should be bonded to earth locally with short leads.
4. Calibration
4.1 Indicator
This is usually pre-set by CMC to the clients needs before despatch, but final calibration will always need
to be done on site, with the correct tension, wrap angle, roller, and transducers according to their
application.
To calibrate the LETIX indicator correctly a spring balance (or weights) to provide the required tension
force and some flat strapping or similar to simulate the web will be needed.
Connect the transducers correctly, and apply power to the unit. After a few seconds, it will go through the
start-up routine. It is a good idea to leave the power on for 10-15 minutes to allow the transducers to
settle.
IMPORTANT Before calibration, ensure that the dipswitches at the rear of the unit are set to the UP
position. After calibration, set them to the DOWN position. This will stop the machine operator from
altering the settings and prevent re-calibration of the indicator.

_____________________________________________________________________________________________________________________
Absolute Measurement Ltd. (T/A CMC Controls)
t: (0) 1732 763278 | e: [e-mail] | w: absolutemeasurement.co.uk
Unit 19 | Silver Birches Business Park | Aston Road | Bromsgrove | B60 3EU
8
Transducer Instruction Manual
Range: LETIX
Type: L-ANI-0-0-R-AC
Revision: V1.0
4.2 Direct Calibration –Full Scale Setting
With the strapping in the machine along the correct web path (as shown in the diagram), pull the
maximum tension value.
Press the “SET 2” button for three seconds. The display will show “direct”, followed by “Set Hi”. Press
“OK”.
4.3 Decimal Point
Press the “SET 2” button again for three seconds. You can now set the decimal point position with the
“UP” or “DOWN” buttons. Press “OK” when done.
4.4 Display value
You can now set the display value you want to see. Use the “DIGIT” button to select each digit in turn and
the “UP” and “DOWN” buttons to increase or decrease each digit’s value, as needed (for example
1500.0). Then press “OK” to save.
4.5 Direct Calibration –Zero Scale Setting
The next step is to remove the web tension. Then press the button marked “SET 1” for three seconds
until the display reads “direct” and then reads “Set Lo”. Press “OK”. The digits will all display 00000.0,
then press “OK” again for display to read (for example 0.0).
The input calibration is now finished, and the tension indicator should read correctly.
4.6 Output Signal Calibration
Once the tension calibration has been done, it is important that the analogue output signal of 4-20mA is
correctly set to match the calibrated scale. If ordered, the indicators can be shipped from CMC Controls
with the output signal set to 100.0 (%) = 20mA. Should other ranges be required, it can be altered.
After calibrating the equipment, and the web tension has been removed, Press the “OUTPUT” button for
three seconds. The display will show “OUTPUT” followed by “4-20mA”, then “Net”. Press “OK”. The
display will now show “Out Lo” and the 0% LED will flash. Display will show 0.0 (= 0% tension). Press
“OK” when done.
The display now shows “Out Hi” and the 100% LED will flash. Use the “DIGIT” button and “UP” and
“DOWN” front panel push buttons to set the displayed value to equal the maximum tension value (for
example 1500.0). Press “OK” when done.
The output signal from terminals 14 & 15 should now be 4-20mA = 0/100% of the maximum tension.
Please Note that the digital display will read numbers above the maximum calibrated value, but the
output will be limited to about 20mA.
IMPORTANT Once this has been done, set the dipswitches at the rear of the unit to the DOWN
position. This will stop the machine operator from altering the settings and prevent re-calibration of the
indicator.

_____________________________________________________________________________________________________________________
Absolute Measurement Ltd. (T/A CMC Controls)
t: (0) 1732 763278 | e: [e-mail] | w: absolutemeasurement.co.uk
Unit 19 | Silver Birches Business Park | Aston Road | Bromsgrove | B60 3EU
9
Transducer Instruction Manual
Range: LETIX
Type: L-ANI-0-0-R-AC
Revision: V1.0
5. Troubleshooting
5.1 Digital Display Not Illuminated When Indicator Is Switched On
[1] Check the incoming mains supply and fuse.
[2] (There are no internal fuses which can be replaced)
5.2 Verify The Transducer Connections
[1] Measure the transducer excitation supply voltage between terminals (negative) 1 & 2 (linked) and
between positive 5 & 6 (linked) and that it is correct for the type of transducer. (5v for Cleveland
Kidder Classic and Ultra series, and 10v for foil type transducers). In addition, measure the
differential millivolt signal at full transducer load to ensure that the unit is given signals within its
correct working range.
5.3 Check The Display Is Reading Correctly When The Transducers Are Loaded
[1] Check the wiring connections to the transducers, interconnecting cables, and mechanical
mounting of the transducers.
[2] Check the resistance values of the transducers, as explained in the transducer section of the
handbook.
[3] Zener Barriers (if fitted) may also need to be checked that they are correct.
[4] Try the re-calibration procedure above.
[5] An exchange unit is available from CMC Controls.
Contact the service department. Notify them of your problem, and a spare Indicator can be
despatched against your order number and the returned Indicator repaired (or credited if found
faulty under warranty).
PLEASE NOTE
This unit CANNOT be repaired in the field, and must be returned to CMC Controls.